When changing the trigger type in the trigger editor, properly redraw the control

Summary: Ref T13269. I refactored this late in the game to organize things better and add table cells around stuff, and accidentally broke the relationship between the "Rule Type" selector and the value selector.

Test Plan: Switched rule type selector from "Change Status" to "Play Sound", saw secondary control update properly.

Reviewers: amckinley

Reviewed By: amckinley

Maniphest Tasks: T13269

Differential Revision: https://secure.phabricator.com/D20326